Drive-gear mechanism



L. H, KEIM DRIVE esAn-macnmsm Dec. 1 1,517,293

Filed Sent. 22 19 2s WITNESSES: I INVENTOR JR. W 0 L esfw' f7, Ke/m,

ATTORNEY Patented Dec. 2, 1924.

U N TT E S T TES LESTER H. KEIM, OF GRAFTON, PENNSYLVANIA, ASSIGNOR TOB. D. NU'ITALL COM- PANY, A CORPORATION OF PENNSYLVANIA.

DRIVELGEAR. MECHANISM.

Application filed September 22, 1923. Serial No. 664,203.

To aZZ whom it may concern:

Be it known that I, LESTER H. Knnu, a citizen of the United States, anda resident of Grafton, in the coiiijnty of Allegheny and State of Pennslv'aii ia, have invented a new and useful mprovement in Drive-GearMechanism, of which the following is a specification.

My invention relates to drive mechanism, more especially to gearreduction units embodying a special type of housing construction whichadapts it for various uses, such as a driving unit for grinding orpolishing heads employed in finishing glassware and the like.

It is among the objects of my invention to provide a drive mechanism ofthe above designated character which shall be of simple, durablemechanical construction, which shall operate efliciently in thepolishing of glassware and which shall be designed and constructed tofacilitate such manufacturing operations.

In the manufacture of plate glass and other vitreous articles, thematerial is subjected to finishing operations consisting of polishingthe surface with a polishing wheel, the type of which varies with theparticular purpose it is desired to accomplish. Some of the finishingoperations are for the purpose of obtaining a specified thickness whichis accomplished by providing adjusting means for the polishing head orwheel so as to make allowances for variations in the position of themember to be ground and for the natural reduction of the workingsurface.

My invention is directed to a drive mechanism for a polishing disk orwheel which is especially designated to provide certain adjustmentsrelative to the work and to maintain alignment of the working surface ofthe polishing disk: with the surface tobe ground. or finished. To carryout this purpose I utilize a housing structure which is pivoted at ornear its center of gravity to a lever arm, which is pivoted to asupporting bracket and is provided with an adjustable counter-balanceweight. I further provide adjusting means for regulating the pressure onthe surface of the polishing disk which is secured to a spindlevertically disposed in the housing and connected by a suitable gearingto a motor mounted on the outside ofthe housing member.

In the accompanying drawing constituting a part hereof and in which likereference characters designate like parts, the single figure comprises aView, partially in vertical section and partially inv elevation, of apolishing head or reduction gear unit embodying the principles of myinvention.

The structure comprises an annular housing 1 having a vertical dependingsleeve member 2 formed integrally therewith or secured thereto, which isadapted to rotatably support a work spindle 3. The spindle 3 is providedwith bearings 4, 5 and 6, to carry the weight of a relatively largebevel gear 7 and a polishing disk 8 secured at the respective ends ofthe spindle.

A drive shaft 9 is journalled in the upper portion of the housing 1, ina horizontal position and at right angles to the spindle 3. The shaft 9is provided at one end with a bevel gear pinion 10 with straight orhelical teeth in co-operative engagement with the bevel gear 7 on thespindle 3 and with a gear 11 on its other end that is either of a spuror helical tooth type and is enclosed in a gear case 12 secured to thehousing 1. A'motor 13 is mounted on the housing memher and is connectedby a pinion 14 on its mounted at 16' on an extending wall bracket 17which may be secured at any height from the work table. Acounter-balancing weight 18 is slidably mounted on the extended end ofthe lever 16 to permit adjustment and may be secured in any position bythe set screw 19. The bracket 17 is provided with an extending arm 20having a screw threaded opening 21 adapted to receive a screw shaft 22provided with a hand wheel 23 which is rotated to raise or lower thelever 16 for the purpose of changing the position of the disk 8.

x A rest 25 comprising a mounting bracket 26 and a yoke 27 having apivotal connection at 28 to the bracket 26 is engaged with the lower endof the housing 2 to steady the disc 8.

The, design of the housing, gear, bearings, and levers is such as toprovide balance within practical limits of the structure on thetrunnions 15 with respect to the pivot connection to the bracket 17 andto maintain iii.)

vertical alinement of the spindle 3 for any position'of the lever 16.The bearings and gear wheels, are designed for the particular operatingconditions when utilized asa polishing head but it is obvious thatmodifications may be made in the proportions anl details of contsructiontov adapt the drive mechanism for any suitable type of service.

It is evident from the above description of my invention that adrive'mechanism embodying a reduction gear unit constructed inaccordance with the principles of my invention, provides a simple,durable. and

eflicient device, which is especially adapted to-the specific servicerequirementsherein specified and which is capable of withstanding thesevere service conditions to which it is subjected.

I claim as my invention 1. A drive mechanism comprising an annularhousing, a counter-balanced lever for pivotally mounting said housing, avertical shaft journalled in an extending arm por tion of said housing,a drive shaft jour- ,nalled transversely of said vertical shaft in thehead portion of said housin a pair of bevel gears connecting said shats, a cylindrical gear wheel mounted on the end of said transverse shaftand adrive motor geared to said last named gear, said motor andcylindrical gear being mounted outside of said housing.

" a Q. A drive mechanism comprising an ana vertically depending a pairof gear wheels connecting sald shaft and spindle and a motor geared tosaid drive shaft. F i 3. A drive mechanism comprising a housing a drivespindle journalled therein, a shaft geared to said spindle, a motormounted on said housing geared said on said lever.

4. A drive mechanism comprising a gear housing having a verticallydepending sleeve portion pivotally mounted. at substantially its centerof gravity, means for steadying said sleeve portion, .a work spindlejour nalled in said sleeve, a drive shaft j ournalled in said gearhousing, a pair of gear wheels connecting said shaft and spindle, amotor geared to said drive shaft and means for efi'ectifig verticalmovement of the entire mechanism.

5. A drive mechanism comprising .a reduction-gear unit, a housingtherefor, and a plurality of pivot arms for supporting said housing.

.6. A drive mechanism comprising a reduction-gear'unit, a housingtherefor, and a plurality of pivot arms connected to trunnions providedon said housing.

7. A drive mechanism comprising a reduction-gear unit, a verticallyelongated casing for housing said mechanism, a pair of trunnionsprovided on the casing near its center of gravity, another pair oftrunnions provided near the lower end portion thereof and leverspivotallfi mounted on suitable supports .for pivota y engaging saidtrunmons.

8.. A drive mechanism comprising a reduction-gear unit, a verticallyelongated casing for housing said mechanism, a pair of trunnionsprovlded on the casing near its center of gravity, another pair oftrunnions provided near the lower end portion thereof, a counteroisedlever for pivotally engag- 'ing said rst named trunnions and a pivotallymounted lever for similarly engaging said other trunnions.

In testimony whereof, I have hereunto subscribed my name this 6th dayof'Sept,

LESTER H. KEIM.

.DISOLAIMER.

' 1,517,293.- Lester H. Keim, Grafton, Pa. DRIVE-GEAR MECHANISM. Patentdated December 2, 1924. Disclaimer filed March 29, 1926, by theassignee, Pittsburgh Plate Glass Oompany. Enters this disclaimer toclaims 2 to 8, inclusive, of said specification, which claims are inthefollowing words: p 2. A drive mechanism Comprising an annular housinghaving a vertically depending sleeve portion pivotally mounted atsubstantially its center of gravity, a Work spindle journalled in saidsleeve, a drive shaft journalled in said annular housing portion, a pairof gear Wheels connecting said shaft and spindle and a motor geared tosaid drive shaf v 3. A drive mechanism comprising a housing a drivespindle journalled therein, a shaft geared to said spindle, a motormounted on said housing geared to said shaft, and an adjustable leverfor said ho-using, saidhousing being pivotally mounted on said lever.

4. A drive mechanism comprising a gear housing having a verticallydepending sleeve portion pivotally mounted at substantially its centerof gravity, means for steadying said sleeve portion, a work spindlejournalled in said sleeve, a drive shaft journalled in said gearhousing, a p-air of gear wheels connecting said shaft and spindle, amotor geared to said driveshaft and means for'effecting verticalmovement of the entire mechanism.

'5. A drive mechanism comprising a reduction-gear unit, a housingtherefor, and

- a plurality of pivot arms for sup-porting said housin 6. A drivemechanism compris ng a reduction-gear unit, a housing therefor,

' engaging said trunnions.

and a plurality of pivot arms connected to trunnions provided on saidhousing.

7. A drive mechanism comp-rising areduction-gear unit, a verticallyelongated casing. for housing said mechanism, a pair of trunnions,provided on the casing near its center of gravity, another pair oftrunnions provided near the'lower end portion thereof and leverspivotally mounted on suitable supports for pivotally 8. A drivemechanism comprising a reduction-gear unit, a vertically elongatedcasing for housing saidmechamsm, a pair of trunnions provlded on thecasing near its center of gravity, another pair of trunnions providednear the lower end portion thereof,-a counter-poised lever for pivotallyengaging said first named trunnions and a pivotally mounted lever forsimilarly engaging said other trunnions.

[Oficz'al Gazette April J3, 1926.]

